/usr/share/applications/ is in gnome-control-center 1:3.28.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/applications/gnome-background-panel.desktop
/usr/share/applications/gnome-bluetooth-panel.desktop
/usr/share/applications/gnome-color-panel.desktop
/usr/share/applications/gnome-control-center.desktop
/usr/share/applications/gnome-datetime-panel.desktop
/usr/share/applications/gnome-default-apps-panel.desktop
/usr/share/applications/gnome-display-panel.desktop
/usr/share/applications/gnome-info-overview-panel.desktop
/usr/share/applications/gnome-keyboard-panel.desktop
/usr/share/applications/gnome-mouse-panel.desktop
/usr/share/applications/gnome-network-panel.desktop
/usr/share/applications/gnome-notifications-panel.desktop
/usr/share/applications/gnome-online-accounts-panel.desktop
/usr/share/applications/gnome-power-panel.desktop
/usr/share/applications/gnome-printers-panel.desktop
/usr/share/applications/gnome-privacy-panel.desktop
/usr/share/applications/gnome-region-panel.desktop
/usr/share/applications/gnome-removable-media-panel.desktop
/usr/share/applications/gnome-search-panel.desktop
/usr/share/applications/gnome-sharing-panel.desktop
/usr/share/applications/gnome-sound-panel.desktop
/usr/share/applications/gnome-ubuntu-panel.desktop
/usr/share/applications/gnome-universal-access-panel.desktop
/usr/share/applications/gnome-user-accounts-panel.desktop
/usr/share/applications/gnome-wacom-panel.desktop
/usr/share/applications/gnome-wifi-panel.desktop